vinyl group


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Related to vinyl group: allyl group
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Noun1.vinyl group - a univalent chemical radical derived from ethylenevinyl group - a univalent chemical radical derived from ethylene
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
References in periodicals archive ?
Grafting occurs by addition of the vinyl group on to the chain radical with subsequent termination of the vinyl radical by abstraction of a further hydrogen atom.
At the end of every branch, there is a vinyl group.
As illustrated in Figure 8, the methylene hydrogen atoms between the vinyl group and the phenyl group should be very labile to abstraction by singlet oxygen since the radical can be resonance stabilized by both the adjacent double bond and the phenyl ring.
The internal crosslinking agent is a silane compound with one vinyl group or allyl group attached to a silicon atom and at least one Si-O bond.
16 ppm due to CH = CH in a monomer having vinyl group, such as monomer NPAM indicates the formation of polymer via vinyl group polymerization.
The name "addition cure" derives from the crosslinking reaction that consists of a multi-functional silicon hydride crosslinker that, in the presence of a precious metal catalyst such as platinum, adds across the double bond of the vinyl group on the siloxane polymer chain.
The vinyl group participates in the peroxide cure of the resin or elastomer system.
The collaborative work exploited near infrared (NIR) spectroscopy, which uses clinically relevant sized specimens, to provide information on both vinyl group conversion and water uptake on the same composite specimen.
At the end of every branch, there is a vinyl group, which makes addition curing possible.
The first preparation of branched vinyl polymers is the self-condensing vinyl polymerization (SCVP) of an inimer, which contains both a potential initiating site and a vinyl group [5], A number of branched vinyl polymers have been prepared through SCVP of inimer via nitroxide radical mediated radical polymerization [6, 7], atom transfer radical polymerization (ATRP) [8-18], and reversible addition fragmentation chain transfer polymerization [19-21], However, these controlled radical polymerizations are usually time-consuming processes due to their relatively low-radical concentration.